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登陆功能和添加功能

2022-08-16 18:01:08 作者：互联网

list.jsp页面的调整：

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!-- 网页使用的语言 -->
<html>
<head>
    <!-- 指定字符集 -->
    <meta charset="utf-8">
    <!-- 使用Edge最新的浏览器的渲染方式 -->
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <!-- viewport视口：网页可以根据设置的宽度自动进行适配，在浏览器的内部虚拟一个容器，容器的宽度与设备的宽度相同。
    width: 默认宽度与设备的宽度相同
    initial-scale: 初始的缩放比，为1:1 -->
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <!-- 上述3个meta标签*必须*放在最前面，任何其他内容都*必须*跟随其后！ -->
    <title>用户信息管理系统</title>

    <!-- 1. 导入CSS的全局样式 -->
    <link href="css/bootstrap.min.css" rel="stylesheet">
    <!-- 2. jQuery导入，建议使用1.9以上的版本 -->
    <script src="js/jquery-2.1.0.min.js"></script>
    <!-- 3. 导入bootstrap的js文件 -->
    <script src="js/bootstrap.min.js"></script>
    <style type="text/css">
        td, th {
            text-align: center;
        }
    </style>
</head>
<body>
<div class="container">
    <h3 style="text-align: center">用户信息列表</h3>
    <div style="float: left;">

        <form class="form-inline">
            <div class="form-group">
                <label for="exampleInputName2">姓名</label>
                <input type="text" class="form-control" id="exampleInputName2" >
            </div>
            <div class="form-group">
                <label for="exampleInputName3">籍贯</label>
                <input type="text" class="form-control" id="exampleInputName3" >
            </div>

            <div class="form-group">
                <label for="exampleInputEmail2">邮箱</label>
                <input type="email" class="form-control" id="exampleInputEmail2"  >
            </div>
            <button type="submit" class="btn btn-default">查询</button>
        </form>

    </div>

    <div style="float:right;margin: 5px;">
        <a class="btn btn-primary" href="add.html">添加联系人</a>
        <a class="btn btn-primary" href="add.html">删除选中</a>
    </div>
    <table border="1" class="table table-bordered table-hover">
        <tr class="success">
            <th><input type="checkbox"></th>
            <th>编号</th>
            <th>姓名</th>
            <th>性别</th>
            <th>年龄</th>
            <th>籍贯</th>
            <th>QQ</th>
            <th>邮箱</th>
            <th>操作</th>
        </tr>

        <c:forEach items="${users}" var="user" varStatus="s">
            <tr>
                <th><input type="checkbox"></th>
                <td>${s.count}</td>
                <td>${user.name}</td>
                <td>${user.gender}</td>
                <td>${user.age}</td>
                <td>${user.address}</td>
                <td>${user.qq}</td>
                <td>${user.email}</td>
                <td><a class="btn btn-default btn-sm" href="update.html">修改</a>&nbsp;<a class="btn btn-default btn-sm" href="">删除</a></td>
            </tr>
        </c:forEach>

    </table>
    <div>
        <nav aria-label="Page navigation">
            <ul class="pagination">
                <li>
                    <a href="#" aria-label="Previous">
                        <span aria-hidden="true">&laquo;</span>
                    </a>
                </li>
                <li><a href="#">1</a></li>
                <li><a href="#">2</a></li>
                <li><a href="#">3</a></li>
                <li><a href="#">4</a></li>
                <li><a href="#">5</a></li>
                <li>
                    <a href="#" aria-label="Next">
                        <span aria-hidden="true">&raquo;</span>
                    </a>
                </li>
                <span style="font-size: 25px;margin-left: 5px;">
                    共16条记录，共4页
                </span>

            </ul>
        </nav>


    </div>
</div>
</body>
</html>

登陆功能

1、调整页面，加入验证码功能

导入CheckCodeServlet类随机生成验证码

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="utf-8"/>
    <meta http-equiv="X-UA-Compatible" content="IE=edge"/>
    <meta name="viewport" content="width=device-width, initial-scale=1"/>
    <title>管理员登录</title>

    <!-- 1. 导入CSS的全局样式 -->
    <link href="css/bootstrap.min.css" rel="stylesheet">
    <!-- 2. jQuery导入，建议使用1.9以上的版本 -->
    <script src="js/jquery-2.1.0.min.js"></script>
    <!-- 3. 导入bootstrap的js文件 -->
    <script src="js/bootstrap.min.js"></script>
    <script type="text/javascript">
        //切换验证码
        function refreshCode() {
            //1、获取验证码图片对象
            var vcode = document.getElementById("vcode");
            //2、设置其src属性，加时间戳
            vcode.src = "${pageContext.request.contextPath}/checkCodeServlet?time="+new Date().getTime();
        }
    </script>
</head>
<body>
<div class="container" style="width: 400px;">
    <h3 style="text-align: center;">管理员登录</h3>
    <form action="${pageContext.request.contextPath}/loginServlet" method="post">
        <div class="form-group">
            <label for="user">用户名：</label>
            <input type="text" name="username" class="form-control" id="user" placeholder="请输入用户名"/>
        </div>

        <div class="form-group">
            <label for="password">密码：</label>
            <input type="password" name="password" class="form-control" id="password" placeholder="请输入密码"/>
        </div>

        <div class="form-inline">
            <label for="vcode">验证码：</label>
            <input type="text" name="verifycode" class="form-control" id="verifycode" placeholder="请输入验证码" style="width: 120px;"/>
            <a href="javascript:refreshCode()">
                <img src="${pageContext.request.contextPath}/checkCodeServlet" title="看不清点击刷新" id="vcode"/>
            </a>
        </div>
        <hr/>
        <div class="form-group" style="text-align: center;">
            <input class="btn btn btn-primary" type="submit" value="登录">
        </div>
    </form>

    <!-- 出错显示的信息框 -->
    <div class="alert alert-warning alert-dismissible" role="alert">
        <button type="button" class="close" data-dismiss="alert" >
            <span>&times;</span></button>
        <strong>登录失败!</strong>
    </div>
</div>
</body>
</html>

登陆功能代码实现

UserDao接口：

public User findUserByUsernameAndPassword(String username,String password);

UserDaoImpl实现类：

    @Override
    public User findUserByUsernameAndPassword(String username, String password) {
        try {
            String sql = "select * from user where username = ? and password = ?";
            User user = template.queryForObject(sql, new BeanPropertyRowMapper<User>(User.class), username,password);
            return user;
        } catch (DataAccessException e) {
            e.printStackTrace();
            return null;
        }
    }

UserService接口：

    public User login(User user);

UserServiceImpl实现类：

    @Override
    public User login(User user) {
        return dao.findUserByUsernameAndPassword(user.getUsername(),user.getPassword());
    }

LoginServlet类：

package com.Case17.web.servlet;

import com.Case17.domain.User;
import com.Case17.service.UserService;
import com.Case17.service.impl.UserServiceImpl;
import org.apache.commons.beanutils.BeanUtils;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.util.Map;

@WebServlet("/loginServlet")
public class LoginServlet extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        //1、设置编码
        request.setCharacterEncoding("UTF-8");

        //2、获取数据
        String verifycode = request.getParameter("verifycode");
        //3、验证码校验
        HttpSession session = request.getSession();
        String checkcode_server = (String) session.getAttribute("CHECKCODE_SERVER");
        session.removeAttribute("CHECKCODE_SERVER");//确保验证码一次性
        if (!checkcode_server.equalsIgnoreCase(verifycode)){
            //验证码错误
            //提示信息
            request.setAttribute("login_msg","验证码错误");
            //跳转登陆页面
            request.getRequestDispatcher("/login.jsp").forward(request,response);
            return;
        }

        Map<String, String[]> map = request.getParameterMap();
        //4、封装User对象
        User user = new User();
        try {
            BeanUtils.populate(user,map);
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        }


        //5、调用Service查询
        UserService service = new UserServiceImpl();
        User login = service.login(user);
        //6、判断是否登陆成功
        if (login!=null){
            //登陆成功
            //将用户存入session
            session.setAttribute("user",login);
            //跳转页面
            response.sendRedirect(request.getContextPath()+"/index.jsp");
        }else {
            //登陆失败
            //提示信息
            request.setAttribute("login_msg","用户名或密码错误");
            //跳转登陆页面
            request.getRequestDispatcher("/login.jsp").forward(request,response);
        }

    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        this.doPost(request, response);
    }
}

添加功能分析

添加功能代码实现

Userdao接口：

void add(User user);

UserDaoImpl实现类：

    @Override
    public void add(User user) {
        //1、定义sql
        String sql = "insert into user values(null,?,?,?,?,?,?,null,null)";
        //2、执行sql
        template.update(sql,user.getName(),user.getGender(),user.getAge(),user.getAddress(),user.getQq(),user.getEmail());
    }

UserService接口：

/**
     * 保存对象
     * @param user
     */
    void addUser(User user);

UserServiceImpl实现类：

    @Override
    public void addUser(User user) {
        dao.add(user);
    }

AddUserServlet类：

package com.Case17.web.servlet;

import com.Case17.domain.User;
import com.Case17.service.UserService;
import com.Case17.service.impl.UserServiceImpl;
import org.apache.commons.beanutils.BeanUtils;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.util.Map;

@WebServlet("/addUserServlet")
public class AddUserServlet extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        //1、设置编码
        request.setCharacterEncoding("utf-8");
        //2、获取参数
        Map<String, String[]> map = request.getParameterMap();
        //3、封装对象
        User user = new User();
        try {
            BeanUtils.populate(user,map);
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        }
        //4、调用Service保存
        UserService service = new UserServiceImpl();
        service.addUser(user);

        //5、跳转到userListServlet
        response.sendRedirect(request.getContextPath()+"/userListServlet");
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        this.doPost(request, response);
    }
}

标签：功能,request,User,添加,登陆,import,login,servlet,user
来源： https://www.cnblogs.com/xjw12345/p/16591992.html